Designed to fit a 1 3/8" or 1 1/2" inside diameter aluminum or steel tube spring rollers. *Large 3/16" Steel Pin is used on Most Quality Metal Rollers and is THICKER than a standard 1/8" Pin and REQUIRES A LARGER PIN HOLE BRACKET. PLEASE NOTE: All Orders are shipped via the US Postal Service. If you do not have a valid postal address and require an alternative shipping carrier, you MUST contact us in advance of purchase to make arrangements. Additional charges will apply.